Low-water fire-extinguisher



(No Model.)

W. BEAMS.

LOW WATER FIRE EXTINGUISHER.

No. 365,861, Patented July 5, 1887.

P i Q O l I ll Ii, 0 00000 x xs m 0 a WWI/0am UNITED STATES PATET rrrcn.

WILLIAM BEAMS, OF PITTSBURG, PENNSYLVANIA.

' LOW-WATER FIRE-EXTINGUISHER...

SPECIFICATION forming-part of Letters Patent No. 365,861, dated July 5, 18187. Application filed February 16, 1887. SerialNo. 22f,847. (N0 model.) '1

To all whom it may concern:

Be it known that I, WILLIAM BEAMS, a citizen of the United States, residing at Pitts burg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Steam -Boil.er Low- WVater Fire-Extinguishers5 and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in steam-boiler low-water fireextinguishers in which agencies automatically applied extin guish fires in the furnaces of steam-boilers upon the occurrence of low water, so as to avoid overheating of the boiler and consequent supervening rupture andexplosion; and it consists of certain peculiar and novel features of construction and arrangement, as hereinafter more specifically claimed and described. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is an end elevation of a boiler with its head removed and with my improvements applied thereto. Fig. 2 is a side elevation of the same, partially broken away to expose the internal operative parts of my invention.

In the said drawings, A designates the shell of a steam-boiler; a, the walls of the setting inclosing the fire-chamber b, and a the firetubes.

Upon the upper side of the boiler-shell Ais set a valve-casing, G. From this casing 0 lead two or more pipes, d, and from the latter two pipes, at, which extend downward into the body of the furnace-chamber b, as shown in Fig.1.

A tube, (1", extends vertically downward through the shell of the boiler A, and below the normal level of the water contained within the shell A. The lower'extremity of the tube (1 is vertically slotted, as shown at d and within the tube d works a valve stem, 6, which carries a valve, d", firmly secured to the stern and seated within the base of the casing O. The water is indicated at E, and it will be seen by reference to the drawings that whenever the level of the water becomes so low as to uncover the slot (1 the steam will enter the casing G to the piston-chamber f of the inletvalve apparatus F, the arrangement being such, as shown in the drawings, as to automatically raise the piston f, and with it the valvef and thusinstantly cutoff the flow of liquid or gaseous fuel to the boiler.

In order to properly secure the valve (1" in its normal position, said valve is seated in a mass of fusible solder, d which is melted by the steam, so as to release the valve when low water occurs, the valve casing or chamber. being arranged, as shown at d to receive the solder.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is

1. An improved extinguisher for boiler-furnaces,consisting of a valve embedded in a fusible metal in the casing or chamber communicating with the interior of the boiler, and also with the interior of the furnace, and a valve located within said casing and operated by steam from the boiler upon the occurrence of lowwater, substantially as and for the purposes described. a

2. The combination, with the valve-chamber and valve, of the fusible metal and the slotted tube, the valve having its stem arranged as shown and described.

8. The combination, with the shell A, the fluted valve-casing O, mounted thereon and provided wit-h the slotted tube d, the valvestem 6, having the valve dfland the pipes d d, leading from the valve-casing to the furnace, of the soldered seat for the said valve (1*, located within the valve-casing, as set forth.

In testimony whereof I have atlixed my signature in presence of two witnesses.

WILLIAM BEAMS.

Witnesses:

JOHN ALLEN, J OHN N. BECKTTT.

IPO 

